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US 2019/0058888 A1Published application
Image processing device and method
AssigneeSony Corporation
InventorMasao SASAKI
Life of this patent
Estimating the term…
Abstract
An image processing device for encoding a video signal including circuitry configured to perform an arithmetic encoding process on a top block of a current block line of the video signal using a context used in the arithmetic encoding process for a previous block of a previous block line.
Claims14
1:
- A decoding method for decoding a bit stream, comprising:
- performing arithmetic decoding of block lines of a first slice of the bit stream in an order from bottom to top, and performing arithmetic decoding of block lines of a second slice of the bit stream in an order from top to bottom;
- and
- performing arithmetic decoding, by circuitry of an image processing device, on a top block of a current block line in the second slice using a context used in the arithmetic decoding for a previous block of a previous block line in the first slice.
1 more element
2:
- The decoding method according to claim 1, further comprising:
- performing arithmetic decoding, by the circuitry, so as to use the context used in the arithmetic decoding for the previous block of the previous block line as an initial value.
3:
- The decoding method according to claim 2, further comprising:
- performing arithmetic decoding, by the circuitry, so as to use a stage of a probability table used in the arithmetic decoding for the previous block of the previous block line as the initial value.
4:
- The decoding method according to claim 3, wherein the previous block line is a neighboring block line on top of the current block line.
5:
- The decoding method according to claim 4, wherein the second slice is a current slice and the first slice is a previous slice.
6:
- The encoding method according to claim 4, further comprising:
- performing arithmetic decoding, by the circuitry, on the top block of the current block line of the bit stream to generate quantized data;
- inversely quantizing the quantized data to generate transformed data;
- and
- inversely transforming the transformed data to a video signal.
2 more elements
7:
- An image processing device for decoding a bit stream, comprising:
- circuitry configured to:
- perform arithmetic decoding of block lines of a first slice of the bit stream in an order from bottom to top, and perform arithmetic decoding of block lines of a second slice of the bit stream in an order from top to bottom;
- and
- perform arithmetic decoding on a top block of a current block line in the second slice using a context used in the arithmetic decoding for a previous block of a previous block line in the first slice.
2 more elements
8:
- The image processing device according to claim 7, wherein the circuitry is configured to perform arithmetic decoding so as to use the context used in the arithmetic decoding process for the previous block of the previous block line as an initial value.
9:
- The image processing device according to claim 8, wherein the circuitry is configured to perform arithmetic decoding so as to use a stage of a probability table used in the arithmetic decoding process for the previous block of the previous block line as the initial value.
10:
- The image processing device according to claim 9, wherein the previous block line is a neighboring block line on top of the current block line.
11:
- The image processing device according to claim 10, wherein the second slice is a current slice and the first slice is a previous slice.
12:
- The image processing device according to claim 10, wherein the circuitry is configured to
- perform arithmetic decoding on the top block of the current block line of the bit stream to generate quantized data.
- inversely quantize the quantized data to generate transformed data;
- and
- inversely transform the transformed data to a video signal.
2 more elements
13:
- The decoding method according to claim 1, wherein the first slice and the second slice are adjacent at a slice boundary as an object.
14:
- The image processing device according to claim 7, wherein the first slice and the second slice are adjacent at a slice boundary as an object.